History 125 Germans 36 Description and travel 31 German Americans 25 Mexican Americans 25 Travel 21 Slavery 19 more ... Social life and customs 19 Annexation to the United States 18 History, Local 17 African Americans 16 Politics and government 16 Biography 13 Mexicans 13 Emigration and immigration 12 Indians of North America 12 Annexation 10 Census records 10 Frontier and pioneer life 10 Histoire 10 Ethnic groups 9 Genealogy 9 Church history 8 Social conditions 8 Economic conditions 7 Ethnic relations 7 Extension to the territories 7 Race relations 7 Fraternal organizations 6 French 6 Immigrants 6 Manners and customs 6 Polish Americans 6 Comanche Indians 5 Education 5 Employment 5 Family 5 Polish people 5 Registers of births, etc 5 Societies, etc 5 less ...